package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpSession;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private UserMapper userMapper;
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 1. 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 2. 不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }
        //生成六位数字验证码
        String code = String.valueOf((int)((Math.random() + 1) * 100000));
        System.out.println("验证码：" + code);
        // 3. 保存验证码到redis
        String key = RedisConstants.LOGIN_CODE_KEY + phone;
        stringRedisTemplate.opsForValue().set(key , code , RedisConstants.LOGIN_CODE_TTL , TimeUnit.MINUTES);
        return Result.ok("发送成功");
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        String key = RedisConstants.LOGIN_CODE_KEY + phone;
        if (stringRedisTemplate.opsForValue().get(key)==null){
            return Result.fail("手机号错误");
        }
        if (!loginForm.getCode().equals(stringRedisTemplate.opsForValue().get(key))){
            return Result.fail("验证码错误");
        }
        User user = query().eq("phone", phone).one();
        UserDTO newUserDto = new UserDTO();
        String token = RandomUtil.randomString(10);
        if (user == null){
            user = createUserWithPhone(phone);
            BeanUtils.copyProperties(user, newUserDto);
        }
        BeanUtils.copyProperties(user, newUserDto);
        Map<String, Object> userMap = BeanUtil.beanToMap(newUserDto,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY + token, userMap);
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY + token, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName("user_" + RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
